Most cheap pianos available now in the market were manufactured in China, Indonesia, Korea and Russia. Their lifespan is only 1-3 years because wood material does not meet the standard. After their useful life is over, the tuning pins screwed into the wood will become loose and cannot be tuned anymore. Another problem is that they are easily attacked by termites as their main component is mixed light hardwood which attract termites. Moreover, when the outer parts get wet, they will become swollen because they are covered with fomega which looks like the real color.
High grade pianos were manufactured in HAMAMATSU, Japan (in the north of Tokyo) such as Apoll, Atlas, Diapason, Earl Windsor, Eterna, Fukuyama & son, Kawai (some models were manufactured in China), Magner, Rosenstock, Victor, Yamaha (some models were manufactured in Indonesia) etc. These pianos are made of well-coated spruce which is safe from termite attack, the color of the outer parts is high grade weather-resistant Polyurethane, with an average lifespan of 40-50 years.
The advantage of pianos made in Japan is that they can be replaced by spare parts of any brands. Many people are interested in secondhand pianos from Japan because the prices are twice cheaper than the new ones and they can last for many decades.